المؤلفون: Panayotova-Dimitrova, Diana

المساهمون: Feoktistova, Maria, Ploesser, Michaela, Kellert, Beate, Horn, Sebastian, Makarov, Roman, Jensen, Federico, Porubsky, Stefan, Marx, Alexander, Kerstan, Andreas, Geserick, Peter, Leverkus, Martin, Hupe, Mike, Schmieder, Astrid, Zenclussen, Ana Claudia, He, You-Wen

الإتاحة: http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-122155